ATP-3-09-02 Field Artillery Survey Download
Page 119 of 168
Improved Position Azimuth Determining System 16 February 2016 ATP 3-09.02 8-9 decontamination. To partially decontaminate the system, the PADS operator should use the M13 decontamination kit. The CDU, plumb bob arm, porro prism cover, circuit breaker covers, flashlight, and battery box latches should be decontaminated. When the survey mission is complete and the unit has established a decontamination point, the entire system can be decontaminated with soapy water. When the entire system is to be decontaminated, extreme caution must be used to prevent exposing the system to high-pressure water. The operator also must ensure that the circuit breaker covers are closed and that any unconnected cable connector is capped or taped. 8-25. A declination station is used to declinate the aiming circle. A compass is periodically checked on a known line of direction, such as a surveyed azimuth using a declination station. A declination station should be established at a place that is convenient to using units. It may be established by a target acquisition platoon survey team. The ideal declination station should have known grid azimuths to four prominent features (for example, a church steeple, radio towers, quad markers). Preferably there should be one prominent feature in each quadrant and at least 1,000 meters from the declination station. When time, tactical situation, or lack of prominent features limits operations, azimuth marks can be established (for example, range pole). However, a minimum distance of 300 meters should be used if possible. 8-26. In establishing a declination station, the direction of each azimuth mark may be determined by computing the azimuth (if the coordinates of the declination station and azimuth marks are known), by applying a measured angle to a known direction, by using PADS/IPADS with optical transfer. The theodolite is used in measuring angles to determine the azimuths for the declination station. 8-27. Declination stations should be established in an area free from local magnetic attraction. The following minimum distances from common objects with magnetic attraction are prescribed: Power lines and electronic equipment: 150 meters. Railroad tracks, artillery, tanks, and vehicles: 75 meters. Barbed wire and personal weapons: 10 meters. 8-28. Whenever a declination station is established, the vertical angle to each azimuth mark should be determined. The vertical angle correction for the aiming circle can then be determined at the same time it is being declinated. 8-29. Any SCP with an azimuth mark may be used as a declination station if the area is free from local magnetic attraction. ESTABLISH A DECLINATION STATION 8-30. When the IPADS or IPADS-G is used to establish a declination station, the criteria for the predetermined site is the same as that described in paragraph 8-21. The preferred procedure, time and tactical situation permitting, is to travel directly from an update point and determine the mean of two azimuths for each azimuth line (as a check) by following normal IPADS or IPADS-G procedures for determining an azimuth. The azimuths should agree within 0.4 mils. To close out the declination station survey, update as soon as possible and record the adjusted data. Record and include measured vertical angles with the declination station data. (The vertical angle is not used with IPADS or IPADS-G but will be used at the declination station to determine a vertical angle correction when the aiming circle is declinated.) TEAM DUTIES TEAM CHIEF (SGT, 13T20) 8-31. The IPADS or IPADS-G team chief: Advises the supported unit commander on the tactical and technical aspects of the IPADS or IPADS-G team. Performs initialization, operation, and PMCS on the IPADS or IPADS-G. Sets up and operates the theodolite when used to mark and update or perform optical transfer.